This is a multifunction LED driver controller designed for key scanning and display management, supporting up to 11 segment outputs and 6–7 grid outputs in a compact integrated circuit.
Part Number: TM1628
Function: LED Controller Driver
Package: SO 28 Pin Type
Manufacturer: Shenzhen Titan Micro Electronics, Goston
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Description
The TM1628 is an LED Controller driven on a 1/7 to 1/8 duty factor. Eleven segment output lines, six grid output lines, 1 segment/grid output lines, one display memory, control circuit, key scan circuit are all incorporated into a single chip to build a highly reliable peripheral device for a single chip microcomputer. Serial data is fed to TM1628 via a three-line serial interface.
It integrates display memory, control logic, and an 8-step dimming circuit while operating through a simple three-wire serial interface. This device is commonly used in embedded systems requiring LED display control and keypad interfacing such as home appliances and consumer electronics.
Features
- CMOS technology ensuring low power consumption
- Supports multiple display configurations from 11 segments / 7 grids to 12 segments / 6 grids
- Integrated key scanning function supporting 8 × 2 matrix
- Built-in 8-level brightness control for LED dimming
- Three-wire serial interface (CLK, DIO, STB) for easy MCU communication
- Internal display RAM for segment data storage
- High integration reduces external component count
Pinouts
LED controller drivers are used in a wide range of applications, including residential and commercial lighting, automotive lighting, signage, displays, and more. Choosing the right LED driver is crucial to ensure the optimal performance and longevity of LEDs in a specific application.
How to Choose This Part
- Select when both LED driving and key scanning are required in one IC
- Ideal for reducing MCU GPIO usage via serial interface
- Suitable for medium-sized segment displays with multiplexing
- Choose based on required segment/grid configuration
- Consider alternatives if higher current driving or larger displays are needed
Applications
- Consumer electronics display panels
- Microwave ovens and washing machine interfaces
- Audio system front panels
- Digital clocks and timers
- Embedded system user interfaces
- Instrumentation displays with keypad input
Alternative / Equivalent Products
- TM1638 LED driver with extended key scan capability
- HT1628 LCD/LED driver controller
- MAX7219 LED display driver for serial interfacing
- PT6961 LED driver with key scan function
- FD650 LED controller for similar display applications
TM1628 PDF Datasheet
